./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 59acfc6d5178664a3f2144603274c2b6e876292a ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 17:48:50,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:48:50,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:48:50,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:48:50,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:48:50,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:48:50,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:48:50,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:48:50,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:48:50,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:48:50,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:48:50,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:48:50,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:48:50,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:48:50,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:48:50,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:48:50,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:48:50,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:48:50,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:48:50,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:48:50,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:48:50,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:48:50,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:48:50,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:48:50,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:48:50,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:48:50,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:48:50,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:48:50,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:48:50,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:48:50,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:48:50,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:48:50,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:48:50,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:48:50,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:48:50,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:48:50,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:48:50,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:48:50,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:48:50,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:48:50,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:48:50,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:48:50,258 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:48:50,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:48:50,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:48:50,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:48:50,259 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:48:50,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:48:50,260 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:48:50,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:48:50,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:48:50,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:48:50,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:48:50,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:48:50,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:48:50,261 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:48:50,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:48:50,262 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:48:50,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:48:50,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:48:50,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:48:50,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:48:50,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:48:50,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:48:50,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:48:50,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:48:50,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:48:50,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:48:50,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:48:50,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:48:50,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:48:50,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59acfc6d5178664a3f2144603274c2b6e876292a [2019-12-07 17:48:50,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:48:50,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:48:50,384 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:48:50,385 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:48:50,385 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:48:50,386 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2019-12-07 17:48:50,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/data/fd53f1aab/0c02bb5ff7c44a9ba5340c082a11a858/FLAGb490a071d [2019-12-07 17:48:50,826 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:48:50,827 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2019-12-07 17:48:50,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/data/fd53f1aab/0c02bb5ff7c44a9ba5340c082a11a858/FLAGb490a071d [2019-12-07 17:48:50,839 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/data/fd53f1aab/0c02bb5ff7c44a9ba5340c082a11a858 [2019-12-07 17:48:50,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:48:50,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:48:50,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:48:50,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:48:50,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:48:50,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:48:50" (1/1) ... [2019-12-07 17:48:50,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff4d688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:50, skipping insertion in model container [2019-12-07 17:48:50,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:48:50" (1/1) ... [2019-12-07 17:48:50,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:48:50,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:48:50,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:48:50,956 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:48:50,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:48:51,006 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:48:51,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51 WrapperNode [2019-12-07 17:48:51,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:48:51,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:48:51,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:48:51,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:48:51,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... [2019-12-07 17:48:51,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... [2019-12-07 17:48:51,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:48:51,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:48:51,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:48:51,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:48:51,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... [2019-12-07 17:48:51,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... [2019-12-07 17:48:51,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... [2019-12-07 17:48:51,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... [2019-12-07 17:48:51,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... [2019-12-07 17:48:51,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... [2019-12-07 17:48:51,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... [2019-12-07 17:48:51,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:48:51,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:48:51,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:48:51,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:48:51,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:48:51,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:48:51,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:48:51,076 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-12-07 17:48:51,076 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-12-07 17:48:51,165 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:48:51,165 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 17:48:51,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:48:51 BoogieIcfgContainer [2019-12-07 17:48:51,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:48:51,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:48:51,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:48:51,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:48:51,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:48:50" (1/3) ... [2019-12-07 17:48:51,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b435cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:48:51, skipping insertion in model container [2019-12-07 17:48:51,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:48:51" (2/3) ... [2019-12-07 17:48:51,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b435cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:48:51, skipping insertion in model container [2019-12-07 17:48:51,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:48:51" (3/3) ... [2019-12-07 17:48:51,171 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2019-12-07 17:48:51,177 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:48:51,181 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:48:51,188 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:48:51,203 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:48:51,203 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:48:51,203 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:48:51,203 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:48:51,203 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:48:51,203 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:48:51,203 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:48:51,203 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:48:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 17:48:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 17:48:51,217 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:51,217 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:51,218 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:51,221 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-12-07 17:48:51,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:51,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4950471] [2019-12-07 17:48:51,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:48:51,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4950471] [2019-12-07 17:48:51,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:48:51,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 17:48:51,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166021334] [2019-12-07 17:48:51,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 17:48:51,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:51,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 17:48:51,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 17:48:51,393 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-12-07 17:48:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:51,472 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-12-07 17:48:51,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 17:48:51,473 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-12-07 17:48:51,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:51,479 INFO L225 Difference]: With dead ends: 24 [2019-12-07 17:48:51,479 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 17:48:51,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 17:48:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 17:48:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 17:48:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 17:48:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 17:48:51,510 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-12-07 17:48:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:51,510 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 17:48:51,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 17:48:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 17:48:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 17:48:51,512 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:51,512 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:51,512 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:51,512 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-12-07 17:48:51,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:51,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815567464] [2019-12-07 17:48:51,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 17:48:51,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815567464] [2019-12-07 17:48:51,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469707476] [2019-12-07 17:48:51,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:51,634 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 17:48:51,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 17:48:51,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:51,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-12-07 17:48:51,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841906897] [2019-12-07 17:48:51,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 17:48:51,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:51,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 17:48:51,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-12-07 17:48:51,675 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-12-07 17:48:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:51,727 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-12-07 17:48:51,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 17:48:51,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-12-07 17:48:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:51,728 INFO L225 Difference]: With dead ends: 21 [2019-12-07 17:48:51,728 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 17:48:51,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 17:48:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 17:48:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 17:48:51,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 17:48:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 17:48:51,732 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-12-07 17:48:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:51,732 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 17:48:51,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 17:48:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 17:48:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 17:48:51,733 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:51,733 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:51,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:51,934 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:51,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:51,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-12-07 17:48:51,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:51,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333251631] [2019-12-07 17:48:51,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 17:48:52,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333251631] [2019-12-07 17:48:52,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376644349] [2019-12-07 17:48:52,111 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:52,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:48:52,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:52,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 17:48:52,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 17:48:52,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:52,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-12-07 17:48:52,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102818216] [2019-12-07 17:48:52,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 17:48:52,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:52,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 17:48:52,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:48:52,150 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-12-07 17:48:52,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:52,198 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-12-07 17:48:52,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 17:48:52,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-12-07 17:48:52,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:52,199 INFO L225 Difference]: With dead ends: 24 [2019-12-07 17:48:52,200 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 17:48:52,200 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-07 17:48:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 17:48:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 17:48:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 17:48:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 17:48:52,203 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-12-07 17:48:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:52,204 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 17:48:52,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 17:48:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 17:48:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 17:48:52,205 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:52,205 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:52,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:52,405 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-12-07 17:48:52,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:52,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247250333] [2019-12-07 17:48:52,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 17:48:52,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247250333] [2019-12-07 17:48:52,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064550670] [2019-12-07 17:48:52,501 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:52,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 17:48:52,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:52,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 17:48:52,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 17:48:52,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:52,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-12-07 17:48:52,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140261717] [2019-12-07 17:48:52,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 17:48:52,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:52,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 17:48:52,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-12-07 17:48:52,545 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2019-12-07 17:48:52,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:52,598 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-12-07 17:48:52,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 17:48:52,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-12-07 17:48:52,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:52,599 INFO L225 Difference]: With dead ends: 27 [2019-12-07 17:48:52,599 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 17:48:52,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-12-07 17:48:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 17:48:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 17:48:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 17:48:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 17:48:52,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-12-07 17:48:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:52,603 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 17:48:52,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 17:48:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 17:48:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 17:48:52,604 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:52,604 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:52,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:52,805 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:52,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-12-07 17:48:52,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:52,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844251796] [2019-12-07 17:48:52,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 17:48:52,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844251796] [2019-12-07 17:48:52,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252893315] [2019-12-07 17:48:52,948 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:52,971 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:48:52,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:52,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 17:48:52,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 17:48:52,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:52,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-12-07 17:48:52,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38266663] [2019-12-07 17:48:52,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 17:48:52,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 17:48:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-07 17:48:52,997 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-12-07 17:48:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:53,062 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-12-07 17:48:53,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 17:48:53,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-12-07 17:48:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:53,064 INFO L225 Difference]: With dead ends: 30 [2019-12-07 17:48:53,064 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 17:48:53,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-12-07 17:48:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 17:48:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 17:48:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 17:48:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 17:48:53,070 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-12-07 17:48:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:53,071 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 17:48:53,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 17:48:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 17:48:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 17:48:53,072 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:53,072 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:53,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:53,273 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-12-07 17:48:53,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:53,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044107731] [2019-12-07 17:48:53,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 17:48:53,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044107731] [2019-12-07 17:48:53,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879714744] [2019-12-07 17:48:53,479 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:53,505 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 17:48:53,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:53,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 17:48:53,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 17:48:53,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:53,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-12-07 17:48:53,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105346476] [2019-12-07 17:48:53,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 17:48:53,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:53,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 17:48:53,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-12-07 17:48:53,532 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-12-07 17:48:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:53,611 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-12-07 17:48:53,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 17:48:53,611 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-12-07 17:48:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:53,612 INFO L225 Difference]: With dead ends: 33 [2019-12-07 17:48:53,612 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 17:48:53,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-12-07 17:48:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 17:48:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 17:48:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 17:48:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-12-07 17:48:53,616 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-12-07 17:48:53,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:53,617 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-12-07 17:48:53,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 17:48:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-12-07 17:48:53,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 17:48:53,618 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:53,618 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:53,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:53,819 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:53,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:53,819 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-12-07 17:48:53,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:53,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862627116] [2019-12-07 17:48:53,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 17:48:53,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862627116] [2019-12-07 17:48:53,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684696464] [2019-12-07 17:48:53,980 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:54,008 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 17:48:54,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:54,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 17:48:54,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 17:48:54,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:54,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-12-07 17:48:54,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130787256] [2019-12-07 17:48:54,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 17:48:54,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:54,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 17:48:54,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-07 17:48:54,029 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-12-07 17:48:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:54,102 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 17:48:54,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 17:48:54,102 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-12-07 17:48:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:54,103 INFO L225 Difference]: With dead ends: 36 [2019-12-07 17:48:54,103 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 17:48:54,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-12-07 17:48:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 17:48:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 17:48:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 17:48:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 17:48:54,107 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-12-07 17:48:54,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:54,108 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 17:48:54,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 17:48:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 17:48:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 17:48:54,109 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:54,109 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:54,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:54,310 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:54,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:54,311 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-12-07 17:48:54,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:54,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017734465] [2019-12-07 17:48:54,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 17:48:54,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017734465] [2019-12-07 17:48:54,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675999930] [2019-12-07 17:48:54,528 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 17:48:54,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 17:48:54,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:54,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-12-07 17:48:54,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271350886] [2019-12-07 17:48:54,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 17:48:54,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:54,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 17:48:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-12-07 17:48:54,582 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2019-12-07 17:48:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:54,665 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-12-07 17:48:54,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 17:48:54,665 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-12-07 17:48:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:54,666 INFO L225 Difference]: With dead ends: 39 [2019-12-07 17:48:54,666 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 17:48:54,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2019-12-07 17:48:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 17:48:54,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-12-07 17:48:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 17:48:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-12-07 17:48:54,672 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-12-07 17:48:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:54,672 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-12-07 17:48:54,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 17:48:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-12-07 17:48:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 17:48:54,673 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:54,673 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:54,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:54,874 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:54,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-12-07 17:48:54,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:54,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60785720] [2019-12-07 17:48:54,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 17:48:55,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60785720] [2019-12-07 17:48:55,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681049941] [2019-12-07 17:48:55,054 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:55,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:48:55,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:55,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 17:48:55,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 17:48:55,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:55,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-12-07 17:48:55,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135381386] [2019-12-07 17:48:55,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 17:48:55,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:55,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 17:48:55,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-07 17:48:55,120 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2019-12-07 17:48:55,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:55,206 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-12-07 17:48:55,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 17:48:55,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-12-07 17:48:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:55,207 INFO L225 Difference]: With dead ends: 42 [2019-12-07 17:48:55,207 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 17:48:55,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2019-12-07 17:48:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 17:48:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 17:48:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 17:48:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 17:48:55,213 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-12-07 17:48:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:55,213 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 17:48:55,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 17:48:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 17:48:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 17:48:55,215 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:55,215 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:55,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:55,416 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-12-07 17:48:55,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:55,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681168831] [2019-12-07 17:48:55,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 17:48:55,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681168831] [2019-12-07 17:48:55,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77493088] [2019-12-07 17:48:55,670 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:55,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 17:48:55,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:55,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 17:48:55,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 17:48:55,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:55,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-12-07 17:48:55,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133774539] [2019-12-07 17:48:55,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 17:48:55,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:55,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 17:48:55,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-12-07 17:48:55,735 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-12-07 17:48:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:55,835 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-12-07 17:48:55,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 17:48:55,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2019-12-07 17:48:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:55,836 INFO L225 Difference]: With dead ends: 45 [2019-12-07 17:48:55,836 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 17:48:55,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2019-12-07 17:48:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 17:48:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-12-07 17:48:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 17:48:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-12-07 17:48:55,841 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-12-07 17:48:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:55,841 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-12-07 17:48:55,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 17:48:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-12-07 17:48:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 17:48:55,842 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:55,842 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:56,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:56,043 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-12-07 17:48:56,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:56,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087436374] [2019-12-07 17:48:56,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 17:48:56,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087436374] [2019-12-07 17:48:56,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858058943] [2019-12-07 17:48:56,330 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:56,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:48:56,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:56,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 17:48:56,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 17:48:56,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:56,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-12-07 17:48:56,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686804843] [2019-12-07 17:48:56,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 17:48:56,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:56,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 17:48:56,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-07 17:48:56,396 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 18 states. [2019-12-07 17:48:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:56,506 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-12-07 17:48:56,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 17:48:56,507 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-12-07 17:48:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:56,507 INFO L225 Difference]: With dead ends: 48 [2019-12-07 17:48:56,508 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 17:48:56,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-12-07 17:48:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 17:48:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-07 17:48:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 17:48:56,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-12-07 17:48:56,512 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-12-07 17:48:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:56,513 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-12-07 17:48:56,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 17:48:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-12-07 17:48:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 17:48:56,514 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:56,514 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:56,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:56,715 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:56,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-12-07 17:48:56,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:56,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514004044] [2019-12-07 17:48:56,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 17:48:56,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514004044] [2019-12-07 17:48:56,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667760312] [2019-12-07 17:48:56,940 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:56,972 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 17:48:56,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:56,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 17:48:56,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 17:48:57,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:57,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-12-07 17:48:57,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387054133] [2019-12-07 17:48:57,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 17:48:57,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:57,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 17:48:57,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-07 17:48:57,002 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2019-12-07 17:48:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:57,108 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-12-07 17:48:57,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 17:48:57,109 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-12-07 17:48:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:57,110 INFO L225 Difference]: With dead ends: 51 [2019-12-07 17:48:57,110 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 17:48:57,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2019-12-07 17:48:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 17:48:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-12-07 17:48:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 17:48:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-12-07 17:48:57,115 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-12-07 17:48:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:57,115 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-12-07 17:48:57,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 17:48:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-12-07 17:48:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 17:48:57,116 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:57,116 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:57,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:57,317 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:57,318 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-12-07 17:48:57,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:57,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685532790] [2019-12-07 17:48:57,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 17:48:57,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685532790] [2019-12-07 17:48:57,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696773869] [2019-12-07 17:48:57,607 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:57,644 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 17:48:57,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:57,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 17:48:57,648 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 17:48:57,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:57,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-12-07 17:48:57,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827203950] [2019-12-07 17:48:57,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 17:48:57,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:57,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 17:48:57,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-12-07 17:48:57,675 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2019-12-07 17:48:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:57,800 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 17:48:57,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 17:48:57,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-12-07 17:48:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:57,801 INFO L225 Difference]: With dead ends: 54 [2019-12-07 17:48:57,801 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 17:48:57,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 17:48:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 17:48:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-07 17:48:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 17:48:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 17:48:57,806 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-12-07 17:48:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:57,806 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 17:48:57,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 17:48:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 17:48:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-12-07 17:48:57,807 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:57,807 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:58,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:58,008 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-12-07 17:48:58,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:58,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847153510] [2019-12-07 17:48:58,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 17:48:58,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847153510] [2019-12-07 17:48:58,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855523632] [2019-12-07 17:48:58,309 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 17:48:58,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 17:48:58,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:58,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-12-07 17:48:58,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718964799] [2019-12-07 17:48:58,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 17:48:58,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:58,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 17:48:58,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-07 17:48:58,366 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2019-12-07 17:48:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:58,489 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-12-07 17:48:58,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 17:48:58,490 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-12-07 17:48:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:58,490 INFO L225 Difference]: With dead ends: 57 [2019-12-07 17:48:58,491 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 17:48:58,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 17:48:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 17:48:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-07 17:48:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 17:48:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-12-07 17:48:58,497 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-12-07 17:48:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:58,497 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-12-07 17:48:58,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 17:48:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-12-07 17:48:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-12-07 17:48:58,498 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:58,498 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:58,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:58,700 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-12-07 17:48:58,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:58,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424023895] [2019-12-07 17:48:58,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 17:48:59,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424023895] [2019-12-07 17:48:59,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950097278] [2019-12-07 17:48:59,040 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:59,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:48:59,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:59,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 17:48:59,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 17:48:59,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:59,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2019-12-07 17:48:59,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113119751] [2019-12-07 17:48:59,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 17:48:59,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 17:48:59,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-12-07 17:48:59,105 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2019-12-07 17:48:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:48:59,244 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-12-07 17:48:59,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 17:48:59,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2019-12-07 17:48:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:48:59,245 INFO L225 Difference]: With dead ends: 60 [2019-12-07 17:48:59,245 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 17:48:59,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 17:48:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 17:48:59,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-07 17:48:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 17:48:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-12-07 17:48:59,249 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-12-07 17:48:59,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:48:59,249 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-12-07 17:48:59,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 17:48:59,249 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-12-07 17:48:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-12-07 17:48:59,250 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:48:59,250 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:48:59,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:59,451 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:48:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:48:59,451 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-12-07 17:48:59,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:48:59,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786476908] [2019-12-07 17:48:59,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:48:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:48:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 17:48:59,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786476908] [2019-12-07 17:48:59,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001678309] [2019-12-07 17:48:59,863 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:48:59,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-07 17:48:59,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:48:59,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 17:48:59,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:48:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 17:48:59,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:48:59,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2019-12-07 17:48:59,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557091370] [2019-12-07 17:48:59,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 17:48:59,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:48:59,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 17:48:59,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-12-07 17:48:59,949 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 23 states. [2019-12-07 17:49:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:00,091 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-12-07 17:49:00,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 17:49:00,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2019-12-07 17:49:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:00,092 INFO L225 Difference]: With dead ends: 63 [2019-12-07 17:49:00,092 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 17:49:00,093 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 17:49:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 17:49:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-07 17:49:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 17:49:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-12-07 17:49:00,096 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-12-07 17:49:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:00,097 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-12-07 17:49:00,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 17:49:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-12-07 17:49:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 17:49:00,097 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:00,097 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:00,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:00,298 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:00,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-12-07 17:49:00,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:00,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518675569] [2019-12-07 17:49:00,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 17:49:00,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518675569] [2019-12-07 17:49:00,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653838389] [2019-12-07 17:49:00,709 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:00,744 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:49:00,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:49:00,745 INFO L264 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 17:49:00,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:49:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 17:49:00,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:49:00,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2019-12-07 17:49:00,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193003095] [2019-12-07 17:49:00,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 17:49:00,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:49:00,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 17:49:00,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2019-12-07 17:49:00,776 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 24 states. [2019-12-07 17:49:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:00,938 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-12-07 17:49:00,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 17:49:00,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2019-12-07 17:49:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:00,939 INFO L225 Difference]: With dead ends: 66 [2019-12-07 17:49:00,940 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 17:49:00,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=539, Invalid=1101, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 17:49:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 17:49:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-07 17:49:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 17:49:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-12-07 17:49:00,944 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-12-07 17:49:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:00,944 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-12-07 17:49:00,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 17:49:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-12-07 17:49:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-12-07 17:49:00,945 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:00,945 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:01,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:01,146 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:01,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-12-07 17:49:01,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:01,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937249568] [2019-12-07 17:49:01,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 17:49:01,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937249568] [2019-12-07 17:49:01,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822062457] [2019-12-07 17:49:01,563 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:01,609 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-12-07 17:49:01,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:49:01,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 17:49:01,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:49:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 17:49:01,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:49:01,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 25 [2019-12-07 17:49:01,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161260779] [2019-12-07 17:49:01,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 17:49:01,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:49:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 17:49:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-12-07 17:49:01,645 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 25 states. [2019-12-07 17:49:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:01,849 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-12-07 17:49:01,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 17:49:01,850 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2019-12-07 17:49:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:01,850 INFO L225 Difference]: With dead ends: 69 [2019-12-07 17:49:01,850 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 17:49:01,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=597, Invalid=1209, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 17:49:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 17:49:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-12-07 17:49:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-07 17:49:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-12-07 17:49:01,855 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-12-07 17:49:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:01,855 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-12-07 17:49:01,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 17:49:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-12-07 17:49:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-12-07 17:49:01,856 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:01,856 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:02,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:02,057 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-12-07 17:49:02,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:02,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680158271] [2019-12-07 17:49:02,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-12-07 17:49:02,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680158271] [2019-12-07 17:49:02,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039654673] [2019-12-07 17:49:02,503 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:02,550 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-07 17:49:02,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:49:02,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 17:49:02,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:49:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-12-07 17:49:02,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:49:02,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2019-12-07 17:49:02,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788999196] [2019-12-07 17:49:02,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 17:49:02,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:49:02,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 17:49:02,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2019-12-07 17:49:02,585 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 26 states. [2019-12-07 17:49:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:02,760 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-12-07 17:49:02,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 17:49:02,760 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 117 [2019-12-07 17:49:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:02,761 INFO L225 Difference]: With dead ends: 72 [2019-12-07 17:49:02,761 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 17:49:02,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=658, Invalid=1322, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 17:49:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 17:49:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-07 17:49:02,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 17:49:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-12-07 17:49:02,765 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-12-07 17:49:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:02,765 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-12-07 17:49:02,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 17:49:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-12-07 17:49:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-12-07 17:49:02,766 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:02,766 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:02,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:02,966 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-12-07 17:49:02,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:02,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860562258] [2019-12-07 17:49:02,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 17:49:03,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860562258] [2019-12-07 17:49:03,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404269795] [2019-12-07 17:49:03,507 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:03,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 17:49:03,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:49:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 17:49:03,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:49:03,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 27 [2019-12-07 17:49:03,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798464261] [2019-12-07 17:49:03,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 17:49:03,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:49:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 17:49:03,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2019-12-07 17:49:03,581 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 27 states. [2019-12-07 17:49:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:03,755 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-12-07 17:49:03,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 17:49:03,756 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2019-12-07 17:49:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:03,756 INFO L225 Difference]: With dead ends: 75 [2019-12-07 17:49:03,756 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 17:49:03,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=722, Invalid=1440, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 17:49:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 17:49:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-12-07 17:49:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-07 17:49:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-12-07 17:49:03,760 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-12-07 17:49:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:03,760 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-12-07 17:49:03,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 17:49:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-12-07 17:49:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-12-07 17:49:03,761 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:03,761 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:03,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:03,962 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:03,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:03,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-12-07 17:49:03,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:03,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904516451] [2019-12-07 17:49:03,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-12-07 17:49:04,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904516451] [2019-12-07 17:49:04,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155802645] [2019-12-07 17:49:04,502 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:04,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:49:04,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:49:04,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 17:49:04,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:49:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-12-07 17:49:04,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:49:04,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 28 [2019-12-07 17:49:04,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931332034] [2019-12-07 17:49:04,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 17:49:04,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:49:04,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 17:49:04,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-12-07 17:49:04,580 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 28 states. [2019-12-07 17:49:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:04,784 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-12-07 17:49:04,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 17:49:04,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 129 [2019-12-07 17:49:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:04,785 INFO L225 Difference]: With dead ends: 78 [2019-12-07 17:49:04,785 INFO L226 Difference]: Without dead ends: 74 [2019-12-07 17:49:04,786 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=789, Invalid=1563, Unknown=0, NotChecked=0, Total=2352 [2019-12-07 17:49:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-07 17:49:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-07 17:49:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-07 17:49:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-12-07 17:49:04,788 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2019-12-07 17:49:04,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:04,788 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-12-07 17:49:04,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 17:49:04,789 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-12-07 17:49:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-12-07 17:49:04,789 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:04,789 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:04,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:04,990 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:04,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:04,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2019-12-07 17:49:04,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:04,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873452025] [2019-12-07 17:49:04,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-12-07 17:49:05,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873452025] [2019-12-07 17:49:05,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895472720] [2019-12-07 17:49:05,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:05,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-12-07 17:49:05,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:49:05,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-07 17:49:05,630 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:49:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-12-07 17:49:05,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:49:05,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 29 [2019-12-07 17:49:05,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092347100] [2019-12-07 17:49:05,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 17:49:05,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:49:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 17:49:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2019-12-07 17:49:05,667 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 29 states. [2019-12-07 17:49:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:05,873 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-12-07 17:49:05,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 17:49:05,873 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 135 [2019-12-07 17:49:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:05,874 INFO L225 Difference]: With dead ends: 81 [2019-12-07 17:49:05,874 INFO L226 Difference]: Without dead ends: 77 [2019-12-07 17:49:05,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=859, Invalid=1691, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 17:49:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-07 17:49:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-12-07 17:49:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-07 17:49:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-12-07 17:49:05,879 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2019-12-07 17:49:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:05,880 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-12-07 17:49:05,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 17:49:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-12-07 17:49:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-12-07 17:49:05,880 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:05,880 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:06,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:06,081 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:06,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash -555819607, now seen corresponding path program 22 times [2019-12-07 17:49:06,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:06,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218772134] [2019-12-07 17:49:06,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-12-07 17:49:06,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218772134] [2019-12-07 17:49:06,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227467298] [2019-12-07 17:49:06,711 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:06,754 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 17:49:06,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:49:06,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 48 conjunts are in the unsatisfiable core [2019-12-07 17:49:06,758 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:49:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-12-07 17:49:06,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:49:06,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 30 [2019-12-07 17:49:06,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881057873] [2019-12-07 17:49:06,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-07 17:49:06,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:49:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-07 17:49:06,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2019-12-07 17:49:06,801 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 30 states. [2019-12-07 17:49:07,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:07,024 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-12-07 17:49:07,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 17:49:07,025 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2019-12-07 17:49:07,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:07,025 INFO L225 Difference]: With dead ends: 84 [2019-12-07 17:49:07,025 INFO L226 Difference]: Without dead ends: 80 [2019-12-07 17:49:07,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=932, Invalid=1824, Unknown=0, NotChecked=0, Total=2756 [2019-12-07 17:49:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-07 17:49:07,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-07 17:49:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-07 17:49:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-12-07 17:49:07,030 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2019-12-07 17:49:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:07,030 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-12-07 17:49:07,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-07 17:49:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-12-07 17:49:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-12-07 17:49:07,031 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:07,031 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:07,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:07,232 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:07,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:07,232 INFO L82 PathProgramCache]: Analyzing trace with hash -945685357, now seen corresponding path program 23 times [2019-12-07 17:49:07,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:07,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914185934] [2019-12-07 17:49:07,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-12-07 17:49:07,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914185934] [2019-12-07 17:49:07,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750188088] [2019-12-07 17:49:07,924 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:07,982 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-12-07 17:49:07,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:49:07,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 17:49:07,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:49:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-12-07 17:49:08,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:49:08,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 31 [2019-12-07 17:49:08,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066767449] [2019-12-07 17:49:08,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 17:49:08,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:49:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 17:49:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=594, Unknown=0, NotChecked=0, Total=930 [2019-12-07 17:49:08,027 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 31 states. [2019-12-07 17:49:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:08,252 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2019-12-07 17:49:08,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 17:49:08,252 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 147 [2019-12-07 17:49:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:08,253 INFO L225 Difference]: With dead ends: 87 [2019-12-07 17:49:08,253 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 17:49:08,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1008, Invalid=1962, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 17:49:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 17:49:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-12-07 17:49:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 17:49:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-12-07 17:49:08,256 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2019-12-07 17:49:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:08,257 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-12-07 17:49:08,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 17:49:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-12-07 17:49:08,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-12-07 17:49:08,257 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:08,258 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:08,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:08,458 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:08,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1588806697, now seen corresponding path program 24 times [2019-12-07 17:49:08,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:08,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361817120] [2019-12-07 17:49:08,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:49:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-12-07 17:49:09,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361817120] [2019-12-07 17:49:09,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389992641] [2019-12-07 17:49:09,189 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:09,247 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-12-07 17:49:09,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:49:09,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 52 conjunts are in the unsatisfiable core [2019-12-07 17:49:09,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:49:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-12-07 17:49:09,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:49:09,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 32 [2019-12-07 17:49:09,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347455827] [2019-12-07 17:49:09,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-07 17:49:09,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:49:09,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-07 17:49:09,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2019-12-07 17:49:09,291 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 32 states. [2019-12-07 17:49:09,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:49:09,534 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2019-12-07 17:49:09,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-07 17:49:09,534 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 153 [2019-12-07 17:49:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:49:09,535 INFO L225 Difference]: With dead ends: 90 [2019-12-07 17:49:09,535 INFO L226 Difference]: Without dead ends: 86 [2019-12-07 17:49:09,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1087, Invalid=2105, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 17:49:09,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-07 17:49:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-07 17:49:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-07 17:49:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-12-07 17:49:09,538 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2019-12-07 17:49:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:49:09,539 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-12-07 17:49:09,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-07 17:49:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-12-07 17:49:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-12-07 17:49:09,539 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:49:09,540 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:49:09,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:49:09,740 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:49:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:49:09,741 INFO L82 PathProgramCache]: Analyzing trace with hash 959677331, now seen corresponding path program 25 times [2019-12-07 17:49:09,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:49:09,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258703901] [2019-12-07 17:49:09,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:49:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:49:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:49:09,811 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 17:49:09,811 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:49:09,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:49:09 BoogieIcfgContainer [2019-12-07 17:49:09,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:49:09,845 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:49:09,845 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:49:09,845 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:49:09,846 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:48:51" (3/4) ... [2019-12-07 17:49:09,847 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 17:49:09,888 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_703e5d7c-2ce2-42fd-b61f-0f2918fbd29f/bin/uautomizer/witness.graphml [2019-12-07 17:49:09,888 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:49:09,889 INFO L168 Benchmark]: Toolchain (without parser) took 19047.16 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 516.4 MB). Free memory was 939.8 MB in the beginning and 876.8 MB in the end (delta: 63.0 MB). Peak memory consumption was 579.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:49:09,889 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:49:09,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -154.7 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-12-07 17:49:09,890 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.54 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:49:09,890 INFO L168 Benchmark]: Boogie Preprocessor took 9.83 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:49:09,890 INFO L168 Benchmark]: RCFGBuilder took 129.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-12-07 17:49:09,891 INFO L168 Benchmark]: TraceAbstraction took 18678.62 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 419.4 MB). Free memory was 1.1 GB in the beginning and 881.5 MB in the end (delta: 193.8 MB). Peak memory consumption was 613.2 MB. Max. memory is 11.5 GB. [2019-12-07 17:49:09,891 INFO L168 Benchmark]: Witness Printer took 42.65 ms. Allocated memory is still 1.5 GB. Free memory was 881.5 MB in the beginning and 876.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. [2019-12-07 17:49:09,892 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 164.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -154.7 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.54 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.83 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 129.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18678.62 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 419.4 MB). Free memory was 1.1 GB in the beginning and 881.5 MB in the end (delta: 193.8 MB). Peak memory consumption was 613.2 MB. Max. memory is 11.5 GB. * Witness Printer took 42.65 ms. Allocated memory is still 1.5 GB. Free memory was 881.5 MB in the beginning and 876.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 25; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=25] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=25, m=0, n=25] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=24, m=1, n=24] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=23, m=2, n=23] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=22, m=3, n=22] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=21, m=4, n=21] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=20, m=5, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=19, m=6, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=18, m=7, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=17, m=8, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=16, m=9, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=15, m=10, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=14, m=11, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=13, m=12, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=12, m=13, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=11, m=14, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=10, m=15, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=9, m=16, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=8, m=17, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=7, m=18, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=6, m=19, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=20, \old(n)=5, m=20, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=21, \old(n)=4, m=21, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=22, \old(n)=3, m=22, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=23, \old(n)=2, m=23, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=24, \old(n)=1, m=24, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=25, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=25, \old(n)=0, \result=25, m=25, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1, m=24, n=1, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2, m=23, n=2, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3, m=22, n=3, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4, m=21, n=4, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5, m=20, n=5, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6, m=19, n=6, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7, m=18, n=7, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8, m=17, n=8, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9, m=16, n=9, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10, m=15, n=10, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11, m=14, n=11, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12, m=13, n=12, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13, m=12, n=13, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14, m=11, n=14, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15, m=10, n=15, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16, m=9, n=16, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17, m=8, n=17, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18, m=7, n=18, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19, m=6, n=19, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20, m=5, n=20, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21, m=4, n=21, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22, m=3, n=22, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23, m=2, n=23, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24, m=1, n=24, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=25, m=0, n=25, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 18.6s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 202 SDtfs, 1131 SDslu, 1350 SDs, 0 SdLazy, 1561 SolverSat, 250 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3392 GetRequests, 2618 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5200 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 4200 NumberOfCodeBlocks, 4200 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3992 ConstructedInterpolants, 0 QuantifiedInterpolants, 1105472 SizeOfPredicates, 348 NumberOfNonLiveVariables, 6096 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...